Bio I Ch 9 Quiz

Which of the following does cytosine pair with?

• guanine
• thymine
• adenine
• a pyrimidine

Prokaryotes contain a ________chromosome, and eukaryotes contain ________ chromosomes.

• single-stranded circular; single-stranded linear
• single-stranded linear; single-stranded circular
• double-stranded circular; double-stranded linear
• double-stranded linear; double-stranded circular

DNA replicates by which of the following models?

• conservative
• semiconservative
• dispersive
• none of the above

The initial mechanism for repairing nucleotide errors in DNA is ________.

• mismatch repair
• DNA polymerase proofreading
• nucleotide excision repair
• thymine dimers

A promoter is ________.

• a specific sequence of DNA nucleotides
• a specific sequence of RNA nucleotides
• a protein that binds to DNA
• an enzyme that synthesizes RNA

Portions of eukaryotic mRNA sequence that are removed during RNA processing are ________.

• exons
• caps
• poly-A tails
• introns

The RNA components of ribosomes are synthesized in the ________.

• cytoplasm
• nucleus
• nucleolus
• endoplasmic reticulum

How long would the peptide be that is translated from this MRNA sequence: 5'-AUGGGCUACCGA-3'?

• 0
• 2
• 3
• 4

Control of gene expression in eukaryotic cells occurs at which level(s)?

• only the transcriptional level
• epigenetic and transcriptional levels
• epigenetic, transcriptional, and translational levels
• epigenetic, transcriptional, post-transcriptional, translational, and post-translational levels

Post-translational control refers to:

• regulation of gene expression after transcription
• regulation of gene expression after translation
• control of epigenetic activation
• period between transcription and translation